atoms

they are particles that have no charge

• neutrons

• protons

• nucleus

• electrons

they are particles that are positively charged

• neutrons

• protons

• nucleus

• electrons

they are particles that are negatively charged

• neutrons

• protons

• nucleus

• electrons

it is the positively charged center of the atom

• neutrons

• protons

• nucleus

• electrons

it takes more than ___________ electrons to equal the mass of 1 proton

• 1800

• 18

• 250

• 8

this is determined by the number of protons in the atom

• atomic number

• isotopes

• atomic mass

• mass number

this is determined by the number of protons in the atom

• atomic number

• isotopes

• atomic mass

• mass number

atoms with different numbers of neutrons but the same number of atoms

• atomic number

• isotopes

• atomic mass

• mass number

the the weighted average of the masses of all the naturally occuring isotopes.

• atomic number

• isotopes

• atomic mass

• mass number

the sum of the protons and neutrons in an atom

• atomic number

• isotopes

• atomic mass

• mass number